false indigo

(noun) any of several plants of the genus Baptisia. Synonyms: wild indigo, false indigo.

(noun) dense shrub of moist riverbanks and flood plains of the eastern United States having attractive fragrant foliage and dense racemes of dark purple flowers. Synonyms: false indigo, bastard indigo, Amorpha fruticosa.

(noun) an erect to spreading hairy shrub of the Pacific coast of the United States having racemes of red to indigo flowers. Synonyms: false indigo, bastard indigo, Amorpha californica.